Sewing-machine-shaft hanger.



No. 630,274. Patented Aug. I, I899. E. T. THOMAS.

SEWING MACHINE SHAFT HANGER.

(Application filed Apr. 28, 1897.) No Model.

| "III" I G EL Iii-m r lllllll Illlllllll I I I q 5 recesses c is provided near its ends with entrrr ca.

Nrnn Sra'rns A'rn'r EDDY T. THOMAS, OF NENV YORK, N. Y., ASSIGNOR TOJOHN J. SULLIVAN, OF READIN l, MASSACHUSETTS.

SEWlNG-MACHlNE-SHAF-T HANGER.

SPECIFICATION forming part of Letters Patent No. 630,274, dated August 1, 1899. Application filed April 26, 1897. Serial No. 638,978. (No model.)

To all whom, it may concern; ing-points afforded, as herein shown, byacon- Be it known that I, EDDY T. THOMAS, a citiical projection 0 formed at the bottom of the zen of the United States, and a resident of the tapering recess 0 in the block 0 and a centercity, county, and State of New York, have inscrew o tapped in the portion of the brace. 55 ventedanew and useful Improvementin Sew- The conical projection and centerscrew reing-Machine-Shaft Hangers, of which the folferred to are adapted to serve as center bearlowing is a specification. ings for the crank-shaft should the balls be This invention has for its object to provide removed or be broken or lost. a simple and efficient construction adapted F denotes the pitman, havinga head or por- 6o for use in sewing-machine stands and similar tion f at its upper end and provided with a devices, whereby a treadle-operated driving cap f, which is secured to the head f by setor crank shaft may be mounted in such a manscrews f The crank to which the pitman is ner as to run with a minimum of friction. to be attached is preferably provided with an In the accompanying drawings, Figure 1 is annular groove d for the reception of balls 6, 65 I 5 a detail view, partly in section, showing a which are to be interposed between the botcrank-shaft and its bearings constructed in tom of said groove and the wall of a correaccordance with my invention. Fig. 2 is an sponding groove formed in the head f and cap elevation of a sewing-machine stand with the f of the pitman. crank-shaft and its driving-wheel mounted To protect the ball-bearings from dust and 70 therein. Fig. 3 is a detail view of one end of also to serve as a housing for the balls, the the crank-shaft, showing one of the sleeves crank-shaft D is preferably provided at its employed for excluding dust from the ballopposite ends with sleeves d having flaring bearings. Fig. 4 is a detail view of the upper portions (1, these sleeves being preferably end of the pitman, and Fig. 5 illustrates a slotted, so that they may be contracted suffi- 7 2 5 slight modification of one end of the ball-bearciently to have a strong frictional hold on the ing crank-shaft. shaft in such a manner as to be retained in Referring to the drawings, A denotes the place. table, and B B the legs or side frames, of a sew- Instead of the V-shaped annular grooves d, ing-machine stand, said legs or side frames formed near the ends of the driving-shaft D, 8o being connected together by a cross-rod B the said shaft may be formed with a shoulder and a brace 0. d as shown in Fig. 5, which will afford a D denotes the driving or crank shaft, proball-receiving recess between itself and the vided with a driving or pulley wheel D and reduced end of the shaft. mounted in a loop in the brace, said loop be- From the foregoing it will be apparent that 85 3 5 ing formed by the parts 0 c c 0 the part c the tapering ball-receivingrecesses into which being provided with a shaft supporting or the ends of the driving-shaft extend will afbearing portion 0 and the part a being proford means whereby any wear of the ball-bearvided with ashaft supporting or bearing porings may be readily taken up simply by adtion 0 Adjustably secured in the bearing justing the block 0 as may be required, the 0 o portion 0 by a set-screw-c is a'bearing-block construction shown affording means whereby 0 provided with atapering recess 0 the bearthe driving-shaft will run at a minimum of ing portion 0 being also provided with a simifriction. lar tapering recess 0 The crank-shaft D, Having thus described my invention, I the endsof which extend within the tapering claim and desire to secure by Letters Pat- 5 annular grooves d for the reception of balls 6, 1. The combination with a driving or crank which are interposed between the grooved shaft having recessed orreduced end portions,

portions of the shaft and the inner walls of of bearings for said shaft provided with tathe said tapering recesses. The said crankpering recesses into which the ends of the I00 shaft is also preferably provided at its ends said shaft extend, one of said bearings being with conical recesses for the reception of bearadjustable to compensate for wear, and balls interposed between the recessed ends of said shaft and the walls of said tapering recesses.

2. The combination with a driving or crank shaft having recessed or reduced end portions, of bearings for said shaft provided with tapering recesses into which the ends of said shaft extend, one of said bearings being adjustable to compensate for wear, and balls interposed between the recessed ends of said shaft and the walls of said tapering recesses, said shaft being provided near its ends with sleeves having flaring portions to serve as housings for the said balls in said tapering recesses.

3. The combination with the driving or crank shaft D provided near its ends with the V-shaped annular grooves d, of bearings for said shaft provided with tapering recesses into which the ends of said shaft ext-end, one of said bearings consisting of the adjustable block 0 and balls in said tapering recesses interposed between the bottoms of said annular grooves and the walls of said bearings.

4. The combination with the driving or crank shaft D provided near its ends with the V-shaped annular grooves 61, of bearings for said shaft provided with tapering recesses into which the ends of said shaft extend, one of said bearings consisting of the adjustable block 0 balls in said tapering recesses interposed between the bottoms of said annular grooves and the walls of said bearings, and split sleeves d having flaring portions (1 to serve as housings for said balls.

5. The combination with the driving or crank shaft D provided with conical recesses in its ends, of bearings for said shaft provided with tapering recesses into which the ends of said shaft ext-end, one of said bearings being adjustable and both of said bearings being provided with pointed or conical bearing= points to enter the said conical recesses in the end of the shaft.

In testimony that I claim the foregoing as my invention I have signed my name, in pres ence of two witnesses, this 21st day of April, 1897.

EDDY T. THOMAS.

Witnesses:

L. HENSEL, ALEXR. MELHADo. 

